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Relax... you have found a reliable extension builder in Knebworth. Up and Out Builds Ltd is a friendly and reliable company based in Knebworth who ...
Amarjeet Gill
Architecture and Construction all in one place.
FREE DRAWINGS for all projects we build.
Buyerz Trading is an established and experienced local extension builder in Knebworth. Please contact us for a free, no obligation quote and compet...
Are you looking for resin driveways in North London? We are a leading builder of driveways and patios in North London. We have expertise in various...
A1 Home Care Building Maintenance are here to help customers who need an Extension Builder in Knebworth. We offer a competitive rate to complete al...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Trusted and professional extension builder in Knebworth. Experienced in all extension buildering work and keeping within budget and on quote. Amcel...
Need an Extension Builder in Knebworth? MA Gower has been helping local clients (20 mile radius) with their extension buildering jobs for many year...
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
Gary Braine
Experienced extension builder ready to quote for your work. G B BUILDSTORE LTD is the best extension builder in Knebworth. No obligation free quote...

In Knebworth, prices for dormer loft conversions range from £41,920 (MA Gower based in AL6) to £42,536 (R. Newman Construction based in AL4), but how much your conversion costs will vary depending on the size of your property, how easy access to your roof is and what you want to use the space for.
The best way to get an accurate price is to compare quotes from extension builders in Knebworth. Post your job on HaMuch now and we'll put you in touch with available extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Dormer Loft Conversion near Stevenage | £44 | £282 |
| Build A Dormer Loft Conversion near Welwyn Garden City | £42 | £269 |
| Build A Dormer Loft Conversion near Hertford | £46 | £290 |
| Build A Dormer Loft Conversion near Hitchin | £43 | £283 |
| Build A Dormer Loft Conversion near East Hertfordshire | £44 | £289 |
| Build A Dormer Loft Conversion near North Hertfordshire | £44 | £283 |
| Build A Dormer Loft Conversion near Hatfield | £42 | £266 |
| Build A Dormer Loft Conversion near Ware | £47 | £296 |
| Build A Dormer Loft Conversion near Harpenden | £45 | £282 |
| Build A Dormer Loft Conversion near Letchworth | £44 | £283 |
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,655

Two storey extension - £88,233

Build a timber frame extension - £26,155

Build a swimming pool - £81,155

Single storey extension - £58,104

Side return extension - £43,246

Install an RSJ - £2,355

Outbuilding - £10,155

Build a Mansard loft conversion - £52,155

Loft conversion - £35,205

Build a kitchen extension - £42,155

Hip to gable loft conversion - £42,155

Granny annexe - £87,155

Garden office - £10,155

Convert a Garage - £16,155

Garage - £18,655

Build a flat roof extension - £22,155

Build a dormer loft conversion - £42,155

Concrete foundations - £6,405

Convert a bungalow loft - £29,155

Convert a basement - £39,246